@article{4c99de53147e46a484a8e152c8daef53,
title = "Mass and star formation rate of the host galaxies of compact binary mergers across cosmic time",
abstract = "We investigate the properties of the host galaxies of compact binary mergers across cosmic time, by means of population-synthesis simulations combined with galaxy catalogues from the EAGLE suite. We analyse the merger rate per galaxy of binary neutron stars (BNSs), black hole-neutron star binaries (BHNSs), and binary black holes (BBHs) from redshift zero up to six. The binary merger rate per galaxy strongly correlates with the stellar mass of the host galaxy at any redshift considered here. This correlation is significantly steeper for BNSs than for both BHNSs and BBHs. Moreover, we find that the merger rate per galaxy depends also on host galaxy's star formation rate (SFR) and metallicity. We derive a robust fitting formula that relates the merger rate per galaxy with galaxy's SFR, stellar mass, and metallicity at different redshifts. The typical masses of the host galaxies increase significantly as redshift decreases, as a consequence of the interplay between delay time distribution of compact binaries and cosmic assembly of galaxies. Finally, we study the evolution of the merger rate density with redshift. At low redshift (z ≤ 0.1) early-type galaxies give a larger contribution to the merger rate density than late-type galaxies. This trend reverts at z ≥ 1.",
keywords = "Black hole physics, Galaxies: stellar content, Gravitational waves, Methods: numerical, Stars: mass-loss",
author = "{Celeste Artale}, M. and Michela Mapelli and Yann Bouffanais and Nicola Giacobbo and Mario Pasquato and Mario Spera",
note = "Funding Information: for the ERC Consolidator grant DEMOBLACK, under contract no. 770017. MS acknowledges funding from the European Union{\textquoteright}s Horizon 2020 research and innovation programme under the Marie-Sk{\l}odowska–Curie grant agreement no. 794393. MP acknowledges funding from the European Union{\textquoteright}s Horizon 2020 research and innovation programme under the Marie-Sk{\l}odowska–Curie grant agreement no. 664931. We acknowledge the Virgo Consortium for making the EAGLE suite available. The EAGLE simulations were performed using the DiRAC-2 facility at Durham, managed by the ICC, and the PRACE facility Curie based in France at TGCC, CEA, Bruy{\`e}res-le-Ch{\^a}tel. Funding Information: We acknowledge the anonymous referee and the internal referee of the LVC, Giuseppe Greco, for their careful reading of this paper. MCA acknowledges Dar{\'i}o Rodrigues for useful discussions. MCA and MM acknowledge financial support from the Austrian National Science Foundation through FWF stand-alone grant P31154-N27 {\textquoteleft}Unraveling merging neutron stars and black hole–neutron star binaries with population synthesis simulations{\textquoteright}. MM and YB acknowledge financial support by the European Research Council Funding Information: We acknowledge the anonymous referee and the internal referee of the LVC, Giuseppe Greco, for their careful reading of this paper. MCA acknowledges Dar?o Rodrigues for useful discussions. MCA and MM acknowledge financial support from the Austrian National Science Foundation through FWF stand-alone grant P31154-N27 'Unraveling merging neutron stars and black hole-neutron star binaries with population synthesis simulations'. MM and YB acknowledge financial support by the European Research Council for the ERC Consolidator grant DEMOBLACK, under contract no. 770017. MS acknowledges funding from the European Union's Horizon 2020 research and innovation programme under the Marie-Sk?odowska-Curie grant agreement no. 794393. MP acknowledges funding from the European Union's Horizon 2020 research and innovation programme under the Marie-Sk?odowska-Curie grant agreement no. 664931. We acknowledge the Virgo Consortium for making the EAGLE suite available. The EAGLE simulations were performed using the DiRAC-2 facility at Durham, managed by the ICC, and the PRACE facility Curie based in France at TGCC, CEA, Bruy?res-le-Ch?tel. Publisher Copyright: {\textcopyright} 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society",
year = "2020",
month = jan,
doi = "10.1093/mnras/stz3190",
language = "English (US)",
volume = "491",
pages = "3419--3434",
journal = "Monthly Notices of the Royal Astronomical Society",
issn = "0035-8711",
publisher = "Oxford University Press",
number = "3",
}